论文部分内容阅读
采用集中塑性铰理论和SAP2000结构分析软件,对某体育练习馆(钢柱周边支承单层柱面网壳)整体结构进行了强震下弹塑性地震响应分析。分析中考虑了几何和材料双重非线性影响,获得了节点位移响应、杆件塑性铰的分布特征和结构的整体变形与失效形态,并评定了整体结构在强震下的极限承载力与失效类型。结果表明:该结构在强震下的失效界限地震加速度峰值为1260gal,最大竖向变形为短向跨度的1/163,满足“避难与救灾建筑结构”的抗震性能设防要求;结构的失效类型为动力失稳破坏,临界失效时出现塑性铰的杆件较少,结构塑性发展程度不充分;由整体稳定控制的单层柱面网壳在满足稳定承载力的要求下具有较大的抗震潜能。
The concentrated plastic hinge theory and SAP2000 structural analysis software are used to analyze the elastic-plastic-plastic response of the whole structure of a sports practice hall (single-layer cylindrical reticulated shell supported by steel columns) under strong earthquake. In the analysis, the double nonlinear influence of geometry and material was taken into account, and the displacement response of the joint, the distribution characteristics of the plastic hinge of the rod and the overall deformation and failure modes of the structure were obtained. The ultimate bearing capacity and failure type of the whole structure under strong earthquakes . The results show that the failure peak seismic acceleration under the strong earthquake is 1260gal and the maximum vertical deformation is 1/163 of the short span, which meets the seismic requirements for “evacuation and disaster relief building structure” and the structural failure Type is dynamic instability damage, there are few rods with plastic hinges in critical failure, and the degree of structural plasticity development is not sufficient. The single-layer cylindrical reticulated shell controlled by the whole has great resistance to the requirement of stable bearing capacity Potential.